USB keyboard puzzle

I have a new Enermax Aurora USB keyboard when I plug it in I get an error message "A device has malfunctioned disconnect and reconnect if its still not working replace" or words to that effect, but if I reconnect it via a usb extension lead it works perfectly.

Have tried it in different sockets that I know work ie printer,mouse etc.

The latest version of these keyboards has an on-board audio chip and will make the keyboard the default audio device. You need to tweak the settings in Control Panel to re-enable your sound card/on-board audio to be the default device.